| Full text | |
| Author(s): |
de Aquino, Caroline Brambilla
;
Fonsaca, Jessica Eliza Silva
;
Domingues, Sergio Humberto
Total Authors: 3
|
| Document type: | Journal article |
| Source: | Journal of Materials Science; v. 58, n. 15, p. 16-pg., 2023-04-07. |
| Abstract | |
In this work, we show the preparation of an energy storage device based on the combination of two distinct classes of materials, mixed transition metal oxides (MTMO) and conductive polymers. Thus, we investigated different proportions between Ru and W precursors to obtain RuO2-WO3, MTMO, proper for energy storage applications. After several characterizations, we were able to evidence W insertion on Ru structure for RuO2-WO3 1:5 and correlate it to the best specific capacitance found (661 mF cm(-2) at 1.0 mA cm(-2)). Targeting at improved results, we combined the most promising MTMO settled with another class of pseudocapacitive material, the polyaniline (PAni). RuO2-WO3 1:5/PAni nanocomposite was synthesized and, after being properly characterized, the attested synergistic effects of components led to a material with superlative capacitive properties, whose capacitance values at 50 mu A cm(-2) reached up to 937 mF cm(-2). With the evidence of this representative value, a symmetrical energy storage device was built and values comparable to commercial ones were accomplished (241 mF cm(-2)). These remarkable results attested that MTMOs wisely architected may offer richer redox reactions and that, through the rational design of nanocomposites, electrochemical capabilities may be impressively broaden, hence comprising a promising cost-effective alternative for energy storage devices. [GRAPHICS] . (AU) | |
| FAPESP's process: | 17/21988-5 - Nanocomposites based on graphene derivatives, two-dimensional metal oxides and conjugated polymers for application in flexible energy storage devices |
| Grantee: | Sergio Humberto Domingues |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 20/13288-6 - Two-dimensional materials and their derivatives in photonic biosensoring of pathogens |
| Grantee: | Jéssica Eliza Silva Fonsaca |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |